/Engine/Source/Runtime/SignalProcessing/Public/DSP/SlidingWindow.h
StoreForFutureWindows stores the necessary samples from InBuffer which will be needed for future windows. It ignores all values in InBuffer which can already be composed as a complete window.
void StoreForFutureWindows ( [TArrayView](API\Runtime\Core\Containers\TArrayView)< const InSampleType > InBuffer )